+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * LCD / Backlight control code for Sharp SL-6000x (tosa)
- *
- * Copyright (c) 2005 Dirk Opfer
- * Copyright (c) 2007,2008 Dmitry Baryshkov
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/spi/spi.h>
-#include <linux/i2c.h>
-#include <linux/gpio/consumer.h>
-#include <linux/fb.h>
-#include <linux/backlight.h>
-#include <linux/slab.h>
-
-#include <asm/mach/sharpsl_param.h>
-
-#include "tosa_bl.h"
-
-#define COMADJ_DEFAULT 97
-
-#define DAC_CH1 0
-#define DAC_CH2 1
-
-struct tosa_bl_data {
- struct i2c_client *i2c;
- struct backlight_device *bl;
- struct gpio_desc *gpio;
-
- int comadj;
-};
-
-static void tosa_bl_set_backlight(struct tosa_bl_data *data, int brightness)
-{
- struct spi_device *spi = dev_get_platdata(&data->i2c->dev);
-
- i2c_smbus_write_byte_data(data->i2c, DAC_CH1, data->comadj);
-
- /* SetBacklightDuty */
- i2c_smbus_write_byte_data(data->i2c, DAC_CH2, (u8)(brightness & 0xff));
-
- /* SetBacklightVR */
- gpiod_set_value(data->gpio, brightness & 0x100);
-
- tosa_bl_enable(spi, brightness);
-}
-
-static int tosa_bl_update_status(struct backlight_device *dev)
-{
- struct backlight_properties *props = &dev->props;
- struct tosa_bl_data *data = bl_get_data(dev);
- int power = max(props->power, props->fb_blank);
- int brightness = props->brightness;
-
- if (power)
- brightness = 0;
-
- tosa_bl_set_backlight(data, brightness);
-
- return 0;
-}
-
-static int tosa_bl_get_brightness(struct backlight_device *dev)
-{
- struct backlight_properties *props = &dev->props;
-
- return props->brightness;
-}
-
-static const struct backlight_ops bl_ops = {
- .get_brightness = tosa_bl_get_brightness,
- .update_status = tosa_bl_update_status,
-};
-
-static int tosa_bl_probe(struct i2c_client *client)
-{
- struct backlight_properties props;
- struct tosa_bl_data *data;
- int ret = 0;
-
- data = devm_kzalloc(&client->dev, sizeof(struct tosa_bl_data),
- GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- data->comadj = sharpsl_param.comadj == -1 ? COMADJ_DEFAULT : sharpsl_param.comadj;
- data->gpio = devm_gpiod_get(&client->dev, "backlight", GPIOD_OUT_LOW);
- ret = PTR_ERR_OR_ZERO(data->gpio);
- if (ret) {
- dev_dbg(&data->bl->dev, "Unable to request gpio!\n");
- return ret;
- }
-
- i2c_set_clientdata(client, data);
- data->i2c = client;
-
- memset(&props, 0, sizeof(struct backlight_properties));
- props.type = BACKLIGHT_RAW;
- props.max_brightness = 512 - 1;
- data->bl = devm_backlight_device_register(&client->dev, "tosa-bl",
- &client->dev, data, &bl_ops,
- &props);
- if (IS_ERR(data->bl)) {
- ret = PTR_ERR(data->bl);
- goto err_reg;
- }
-
- data->bl->props.brightness = 69;
- data->bl->props.power = FB_BLANK_UNBLANK;
-
- backlight_update_status(data->bl);
-
- return 0;
-
-err_reg:
- data->bl = NULL;
- return ret;
-}
-
-static void tosa_bl_remove(struct i2c_client *client)
-{
- struct tosa_bl_data *data = i2c_get_clientdata(client);
-
- data->bl = NULL;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int tosa_bl_suspend(struct device *dev)
-{
- struct tosa_bl_data *data = dev_get_drvdata(dev);
-
- tosa_bl_set_backlight(data, 0);
-
- return 0;
-}
-
-static int tosa_bl_resume(struct device *dev)
-{
- struct tosa_bl_data *data = dev_get_drvdata(dev);
-
- backlight_update_status(data->bl);
- return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(tosa_bl_pm_ops, tosa_bl_suspend, tosa_bl_resume);
-
-static const struct i2c_device_id tosa_bl_id[] = {
- { "tosa-bl", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(i2c, tosa_bl_id);
-
-static struct i2c_driver tosa_bl_driver = {
- .driver = {
- .name = "tosa-bl",
- .pm = &tosa_bl_pm_ops,
- },
- .probe_new = tosa_bl_probe,
- .remove = tosa_bl_remove,
- .id_table = tosa_bl_id,
-};
-
-module_i2c_driver(tosa_bl_driver);
-
-MODULE_AUTHOR("Dmitry Baryshkov");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA");
-
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * LCD / Backlight control code for Sharp SL-6000x (tosa)
- *
- * Copyright (c) 2005 Dirk Opfer
- * Copyright (c) 2007,2008 Dmitry Baryshkov
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/spi/spi.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#include <linux/gpio/consumer.h>
-#include <linux/delay.h>
-#include <linux/lcd.h>
-#include <linux/fb.h>
-
-#include <asm/mach/sharpsl_param.h>
-
-#include "tosa_bl.h"
-
-#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
-
-#define TG_REG0_VQV 0x0001
-#define TG_REG0_COLOR 0x0002
-#define TG_REG0_UD 0x0004
-#define TG_REG0_LR 0x0008
-
-/*
- * Timing Generator
- */
-#define TG_PNLCTL 0x00
-#define TG_TPOSCTL 0x01
-#define TG_DUTYCTL 0x02
-#define TG_GPOSR 0x03
-#define TG_GPODR1 0x04
-#define TG_GPODR2 0x05
-#define TG_PINICTL 0x06
-#define TG_HPOSCTL 0x07
-
-
-#define DAC_BASE 0x4e
-
-struct tosa_lcd_data {
- struct spi_device *spi;
- struct lcd_device *lcd;
- struct i2c_client *i2c;
- struct gpio_desc *gpiod_tg;
-
- int lcd_power;
- bool is_vga;
-};
-
-static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data)
-{
- u8 buf[1];
- struct spi_message msg;
- struct spi_transfer xfer = {
- .len = 1,
- .cs_change = 0,
- .tx_buf = buf,
- };
-
- buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f);
- spi_message_init(&msg);
- spi_message_add_tail(&xfer, &msg);
-
- return spi_sync(spi, &msg);
-}
-
-int tosa_bl_enable(struct spi_device *spi, int enable)
-{
- /* bl_enable GP04=1 otherwise GP04=0*/
- return tosa_tg_send(spi, TG_GPODR2, enable ? 0x01 : 0x00);
-}
-EXPORT_SYMBOL(tosa_bl_enable);
-
-static void tosa_lcd_tg_init(struct tosa_lcd_data *data)
-{
- /* TG on */
- gpiod_set_value(data->gpiod_tg, 0);
-
- mdelay(60);
-
- /* delayed 0clk TCTL signal for VGA */
- tosa_tg_send(data->spi, TG_TPOSCTL, 0x00);
- /* GPOS0=powercontrol, GPOS1=GPIO, GPOS2=TCTL */
- tosa_tg_send(data->spi, TG_GPOSR, 0x02);
-}
-
-static void tosa_lcd_tg_on(struct tosa_lcd_data *data)
-{
- struct spi_device *spi = data->spi;
- int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR;
-
- if (data->is_vga)
- value |= TG_REG0_VQV;
-
- tosa_tg_send(spi, TG_PNLCTL, value);
-
- /* TG LCD pannel power up */
- tosa_tg_send(spi, TG_PINICTL, 0x4);
- mdelay(50);
-
- /* TG LCD GVSS */
- tosa_tg_send(spi, TG_PINICTL, 0x0);
-
- if (IS_ERR_OR_NULL(data->i2c)) {
- /*
- * after the pannel is powered up the first time,
- * we can access the i2c bus so probe for the DAC
- */
- struct i2c_adapter *adap = i2c_get_adapter(0);
- struct i2c_board_info info = {
- .dev_name = "tosa-bl",
- .type = "tosa-bl",
- .addr = DAC_BASE,
- .platform_data = data->spi,
- };
- data->i2c = i2c_new_client_device(adap, &info);
- }
-}
-
-static void tosa_lcd_tg_off(struct tosa_lcd_data *data)
-{
- struct spi_device *spi = data->spi;
-
- /* TG LCD VHSA off */
- tosa_tg_send(spi, TG_PINICTL, 0x4);
- mdelay(50);
-
- /* TG LCD signal off */
- tosa_tg_send(spi, TG_PINICTL, 0x6);
- mdelay(50);
-
- /* TG Off */
- gpiod_set_value(data->gpiod_tg, 1);
- mdelay(100);
-}
-
-int tosa_lcd_set_power(struct lcd_device *lcd, int power)
-{
- struct tosa_lcd_data *data = lcd_get_data(lcd);
-
- if (POWER_IS_ON(power) && !POWER_IS_ON(data->lcd_power))
- tosa_lcd_tg_on(data);
-
- if (!POWER_IS_ON(power) && POWER_IS_ON(data->lcd_power))
- tosa_lcd_tg_off(data);
-
- data->lcd_power = power;
- return 0;
-}
-
-static int tosa_lcd_get_power(struct lcd_device *lcd)
-{
- struct tosa_lcd_data *data = lcd_get_data(lcd);
-
- return data->lcd_power;
-}
-
-static int tosa_lcd_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
-{
- struct tosa_lcd_data *data = lcd_get_data(lcd);
-
- if (mode->xres == 320 || mode->yres == 320)
- data->is_vga = false;
- else
- data->is_vga = true;
-
- if (POWER_IS_ON(data->lcd_power))
- tosa_lcd_tg_on(data);
-
- return 0;
-}
-
-static struct lcd_ops tosa_lcd_ops = {
- .set_power = tosa_lcd_set_power,
- .get_power = tosa_lcd_get_power,
- .set_mode = tosa_lcd_set_mode,
-};
-
-static int tosa_lcd_probe(struct spi_device *spi)
-{
- int ret;
- struct tosa_lcd_data *data;
-
- data = devm_kzalloc(&spi->dev, sizeof(struct tosa_lcd_data),
- GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- data->is_vga = true; /* default to VGA mode */
-
- /*
- * bits_per_word cannot be configured in platform data
- */
- spi->bits_per_word = 8;
-
- ret = spi_setup(spi);
- if (ret < 0)
- return ret;
-
- data->spi = spi;
- spi_set_drvdata(spi, data);
-
- data->gpiod_tg = devm_gpiod_get(&spi->dev, "tg #pwr", GPIOD_OUT_LOW);
- if (IS_ERR(data->gpiod_tg))
- return PTR_ERR(data->gpiod_tg);
-
- mdelay(60);
-
- tosa_lcd_tg_init(data);
-
- tosa_lcd_tg_on(data);
-
- data->lcd = devm_lcd_device_register(&spi->dev, "tosa-lcd", &spi->dev,
- data, &tosa_lcd_ops);
-
- if (IS_ERR(data->lcd)) {
- ret = PTR_ERR(data->lcd);
- data->lcd = NULL;
- goto err_register;
- }
-
- return 0;
-
-err_register:
- tosa_lcd_tg_off(data);
- return ret;
-}
-
-static void tosa_lcd_remove(struct spi_device *spi)
-{
- struct tosa_lcd_data *data = spi_get_drvdata(spi);
-
- i2c_unregister_device(data->i2c);
-
- tosa_lcd_tg_off(data);
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int tosa_lcd_suspend(struct device *dev)
-{
- struct tosa_lcd_data *data = dev_get_drvdata(dev);
-
- tosa_lcd_tg_off(data);
-
- return 0;
-}
-
-static int tosa_lcd_resume(struct device *dev)
-{
- struct tosa_lcd_data *data = dev_get_drvdata(dev);
-
- tosa_lcd_tg_init(data);
- if (POWER_IS_ON(data->lcd_power))
- tosa_lcd_tg_on(data);
- else
- tosa_lcd_tg_off(data);
-
- return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(tosa_lcd_pm_ops, tosa_lcd_suspend, tosa_lcd_resume);
-
-static struct spi_driver tosa_lcd_driver = {
- .driver = {
- .name = "tosa-lcd",
- .pm = &tosa_lcd_pm_ops,
- },
- .probe = tosa_lcd_probe,
- .remove = tosa_lcd_remove,
-};
-
-module_spi_driver(tosa_lcd_driver);
-
-MODULE_AUTHOR("Dmitry Baryshkov");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA");
-MODULE_ALIAS("spi:tosa-lcd");
projects / platform / kernel / linux-starfive.git / commitdiff